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[ The PC Guide | Systems and Components Reference Guide | Motherboard and System Devices | System BIOS | BIOS Settings | Integrated Peripherals ]

Integrated Serial Port 1 / Serial Port 2

This setting lets you specify the resources for the first and second serial ports on the motherboard. The exact name used for the various options varies (some call them "COM1", "COM2", etc. while others just list the I/O address and IRQ options). For each serial port setting you will typically find these:

  • 3F8/IRQ4 (COM1): Sets the serial port to the I/O address and IRQ normally used by COM1. This is usually the default for the first serial port.
  • 2F8/IRQ3 (COM2): Sets the serial port to the I/O address and IRQ normally used by COM2. This is usually the default for the second serial port.
  • 3E8/IRQ4 (COM3): Sets the serial port to the I/O address and IRQ normally used by COM3.
  • 2E8/IRQ3 (COM4): Sets the serial port to the I/O address and IRQ normally used by COM4.
  • (Other options): Some systems now let you select other IRQs to assign to the onboard ports, to use if you are trying to avoid a resource conflict.
  • Disabled: Disables the serial port.

Normally you will set the first serial port to the resource settings for COM1, and the second to COM2. If you are using an internal modem and you want it to be set up by your system as COM2, the easiest way to do this without generating any conflicts is to disable the second serial port here, to prevent interference.

Next: Integrated Parallel Port


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